EP0314637B1 - Système de commande hydraulique pour tracteurs - Google Patents

Système de commande hydraulique pour tracteurs Download PDF

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Publication number
EP0314637B1
EP0314637B1 EP88830434A EP88830434A EP0314637B1 EP 0314637 B1 EP0314637 B1 EP 0314637B1 EP 88830434 A EP88830434 A EP 88830434A EP 88830434 A EP88830434 A EP 88830434A EP 0314637 B1 EP0314637 B1 EP 0314637B1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
circuit
tractors
pump
lifting system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88830434A
Other languages
German (de)
English (en)
Other versions
EP0314637A3 (en
EP0314637A2 (fr
Inventor
Secondo Bisleri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Same SpA
Original Assignee
Same SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Same SpA filed Critical Same SpA
Priority to AT88830434T priority Critical patent/ATE65221T1/de
Publication of EP0314637A2 publication Critical patent/EP0314637A2/fr
Publication of EP0314637A3 publication Critical patent/EP0314637A3/en
Application granted granted Critical
Publication of EP0314637B1 publication Critical patent/EP0314637B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/08—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/07—Supply of pressurised fluid for steering also supplying other consumers ; control thereof

Definitions

  • the present invention provides a new hydraulic operating system for tractors of the type including a gearbox with a lubricating circuit, a hydraulic steering system, a power take _ off, a hydraulically-operated controlled lifting system, and auxiliary hydraulic devices.
  • the hydraulic system according to the invention is characterised by the features of the characterizing part of claim 1.
  • the hydraulic operating system includes two separate and distinct hydraulic circuits, indicated 1 and 2 respectively.
  • the first circuit 1 includes an oil reservoir 3 (the casing of the tractor gearbox) and a hydraulic pump 4 which operates the power take-off 5 of the tractor, supplies the lubricating circuit 6 of the tractor gearbox, and operates any other locking and clutch devices.
  • the second hydraulic circuit 2 includes a reservoir 7 and a pair of hydraulic pumps 8, 9 disposed in parallel, of which the first supplies the hydraulic steering system 10 and the controlled lifting system 12 of the tractor and the second supplies the distributors of the auxiliary hydraulic devices 11.
  • the circuit 2 further includes a solenoid valve 13 for connecting the output of the hydraulic steering system 10 selectively to the input of the auxiliary distributors 11, and a piloted valve 14 which enables the output of the auxiliary distributors 11 to be connected selectively to the lifting system 12.
  • the solenoid valve 13 and the piloted valve 14 enable the selective boosting of the supply from the pump 8 and the pump 9 respectively to the auxiliary distributors 11 or to the lifting system 12.
  • the adoption of the two separate circuits 1 and 2 enables the power absorbed by the engine of the tractor and the power dissipated, as well as the level of the oil in the tractor gearbox, to be reduced and at the same time ensures that the various hydraulic components have a longer working life by virtue of the possibility of more effective filtration of the hydraulic fluid which is divided between the two separate circuits.
  • the conformation of the circuit 2, particularly the adoption of the two pumps 8 and 9, the solenoid valve 13 and the piloted valve 14, ensures that the auxiliary devices 11 and the lifting system 12 operate simultaneously, as well as providing greater flexibility in use by virtue of the possibility of operation at selectively different power levels.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Power Steering Mechanism (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)

Claims (1)

1. Système d'actionnement hydraulique pour tracteurs,comprenant une boite de vitesses avec un circuit de graissage, un dispositif de direction hydraulique, une prise de force, un dispositif de relevage hydraulique commandé, et des dispositifs hydrauliques auxiliaires, caractérisé en ce qu'il comprend deux circuits hydrauliques séparés (1, 2) avec des réservoirs respectifs séparés (3, 7), le premier circuit (1) comprenant une pompe (4) pour alimenter le circuit de graissage de la boite de vitesses (6) et la prise de force (5), et le second circuit (2) comprenant deux pompes (8, 9) en parallèle dont la première pompe (8) alimente simultanément le dispositif de direction hydraulique (10) et le dispositif de relevage (12), et dont la seconde pompe (9) alimente les dispositifs hydrauliques auxiliaires (11); le second circuit (2) comprenant en outre des moyens (13,14) pour renforcer sélectivement l'alimentation des dispositifs hydrauliques auxiliaires (11) ou le dispositif de relevage (12) en provenance de la première pompe (8) et de la seconde pompe (9), respectivement.
EP88830434A 1987-10-26 1988-10-25 Système de commande hydraulique pour tracteurs Expired - Lifetime EP0314637B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88830434T ATE65221T1 (de) 1987-10-26 1988-10-25 Hydraulisches arbeitssystem fuer traktoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8753752U IT212379Z2 (it) 1987-10-26 1987-10-26 Sistema idraulico di comando per trattori
IT5375287U 1987-10-26

Publications (3)

Publication Number Publication Date
EP0314637A2 EP0314637A2 (fr) 1989-05-03
EP0314637A3 EP0314637A3 (en) 1990-01-24
EP0314637B1 true EP0314637B1 (fr) 1991-07-17

Family

ID=11284961

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88830434A Expired - Lifetime EP0314637B1 (fr) 1987-10-26 1988-10-25 Système de commande hydraulique pour tracteurs

Country Status (5)

Country Link
EP (1) EP0314637B1 (fr)
AT (1) ATE65221T1 (fr)
DE (1) DE3863745D1 (fr)
ES (1) ES2025331B3 (fr)
IT (1) IT212379Z2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT3427U1 (de) * 1998-09-25 2000-03-27 Steyr Daimler Puch Ag Hydraulisches system für ackerschlepper und selbstfahrende arbeitsmaschinen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2491020A1 (fr) * 1980-09-29 1982-04-02 Fenwick Manutention Ste Indle Vehicule electrique, notamment chariot elevateur, comportant une direction hydrostatique alimentee par l'intermediaire d'un distributeur a centre ferme
DE3237019C2 (de) * 1981-10-07 1994-07-28 Linde Ag Hublader mit einer Lenkanlage mit hydrostatischer Lenkkraftunterstützungsanlage
DE3433896A1 (de) * 1983-09-14 1985-03-28 Linde Ag, 6200 Wiesbaden Hydraulische anlage fuer ein lenkbares fahrzeug mit batterie-elektrischem antrieb
DE3334253A1 (de) * 1983-09-22 1985-04-04 Klöckner-Humboldt-Deutz AG, 5000 Köln Hydraulische steuereinrichtung fuer die arbeitshydraulik von traktoren

Also Published As

Publication number Publication date
EP0314637A3 (en) 1990-01-24
DE3863745D1 (de) 1991-08-22
IT8753752V0 (it) 1987-10-26
EP0314637A2 (fr) 1989-05-03
ES2025331B3 (es) 1992-03-16
IT212379Z2 (it) 1989-07-04
ATE65221T1 (de) 1991-08-15

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